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Cap-A-Dapt Distributor Cap and Fixed Rotor Kit with Spacer
InfoVehicle Info Needed
MSD IGNITIONPART NUMBER: 121-8445

Cap-A-Dapt Distributor Cap and Fixed Rotor Kit with Spacer

$9995
5 left in stock
ShippingShips on Nov 02, 2026
Lowest PriceLowest Price Guarantee

Cap-A-Dapts
Large Diameter Cap Conversion Kit with Cap, Rotor and Spacer
  • Fits Most Pro-Billet Distributors
  • Spark Plug Style Cap Terminals Resist Vibration
  • Brass Cap Terminals
  • Rynite Injection Molded Fixed Rotor
  • Cap Spacer Included

    A small distributor cap puts the terminals close together, which invites crossfire once cylinder pressure and spark energy climb. This kit converts a Pro-Billet distributor to a larger diameter cap, spreading the terminals further apart and using spark plug style terminals so the wire connections will not vibrate loose. The rotor is injection molded from Rynite for strength at rpm.

    MSD 8445 Cap-A-Dapt Distributor Cap and Fixed Rotor Kit Features:

    • Large diameter cap with brass terminals.
    • Fixed rotor injection molded from Rynite.
    • Cap spacer included.
    • Spark plug style cap terminals for tight, vibration-resistant connections.
    • Installs on most Pro-Billet distributors.
    • MSD distributor caps and rotors are designed with performance in mind and molded from high-quality, voltage-insulating material with terminals that resist carbon tracking. Whenever the distributor cap is changed, you should install a new rotor. Likewise, if you're replacing the rotor, be sure to install a new cap as well. MSD has new kits featuring Rynite injection molded distributor caps and retainers to complete your distributor tune-up. MSD also has Cap-A-Dapts to fit large Ford-style caps onto MSD distributors.
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      Keep your ignition system running at peak performance with MSD Distributor Caps and Rotors, engineered for long-lasting reliability and superior spark delivery. Whether you're performing routine maintenance or upgrading your ignition components, these high-quality parts are designed to meet the demands of street and strip applications alike.

      Each MSD distributor cap and rotor is built with performance in mind, using high-dielectric strength materials that resist carbon tracking and ensure accurate spark distribution. The brass terminals provide better conductivity and longer life compared to standard aluminum terminals, helping to deliver consistent ignition timing and improved throttle response.

      Designed to be a direct-fit replacement for MSD distributors, the MSD distributor cap ensures a secure connection and excellent durability under high-heat, high-vibration engine bay conditions. Whether you're tackling tough driving conditions or logging laps at the track, you can count on these components to perform when it matters most.

      The MSD rotor is equally robust, constructed from top-grade materials to handle the high voltage output of performance ignition systems. It delivers precise spark transfer to the cap terminals, supporting high-RPM operation and clean combustion with every cycle.

      For street cars, muscle cars, and race vehicles alike, MSD Distributor Caps and Rotors are the smart choice for drivers who demand dependability, performance, and easy installation. Upgrade with MSD to maintain your ignition system’s edge and keep your engine firing on all cylinders.

    Part TypeDistributor Cap and Rotor Kit
    Product LineMSD Distributor Caps and Rotors
    BrandMSD IGNITION
    Package Height5.6
    Package Width5.8
    Package Length6.3
    Weight1.43 PG
    Part CategoryPerformance Parts
    Rotor Attachment TypeScrew-On
    Rotor IncludedYes
    Plug Wire RetainerNo
    Distributor Cap ColorRed
    ColorBlack / Red
    QuantitySold Individually
    Distributor TypeAccessories
    Cap Attachment StyleClamp down
    Cap Mounted CoilNo
    Distributor Cap MaterialRynite
    Cap StyleMale/HEI
    Part FitmentSemi Universal
    Coil Dust Cover IncludedNo
    Contact Terminal MaterialStainless steel
    Vendor Part Number8445
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews

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